Honing device



Apfil 15, 1941. H. s. INDGE 2,238,326

HQNING DEVICE Filed Nov. 26, 1938 2 Sheets-Sheet 1 i 11, @1,1m 59W@ ww.10.1446 Rig/m) April 15, 1941. H. S. INDG 2,238,326.

Houma Amsvlcr: Filed Nov. 2e, 19:58 2 sheets-sheet 2 Jaz .9a

0 v 54 50 J6 J8 J4- Jlz l l J4 17:4 JZ J0 il I 56 9 44 l 44 I 58 a 66 JaJ2 f 6a 48 4Z 62 5a -j 6a 5 J4 jLLt 'J4 v 3mm/www Patented Apr. 15, 1941HONING DEVICE Herbert S. Indgc, Wcstboro, Mass., assigner to NortonCompany, Worcester, Mass.,

tion of Massachusetts Application November 26, 1938, Serial No. 242,445

3 Claims.

This invention relates to a device for honing or polishing cylindricalsurfaces.

One object of the invention is to provide a honing device capable ofhoning an external cylindrical surface which is so constructed that `thehoning sticks may be readily adjusted to predetermined positions landheld in proper abrading contact with the work, and when the hone iswithdrawn from the work, the sticks are automatically moved radiallyaway from a normal honing operation by self contained mechanism withinthe head. Fur-ther objects will be appare-nt in the following disclosureReferring to the drawings, which illustrate one embodiment of thisinvention:

Fig. l is a fragmentary vertical section of the honing device with theparts in their operative honing positions;

Fig. 2 is a similar View, with the parts in their inoperative positions;and

Fig. 3 is a section on the line 3-3 of Fig. 2.

In accordance with this invention, I have provided a mechanism forhoning cylindrical surfaces by means of one or more abrasive stickswhich are both reciprocated and revolved about the axis of the worksurface. The mechanism comprises honing sticks which are removablymounted on a revolving and reciprocating head and which are adjustablypositioned relative to the work by suitable mechanical devices, such asWedge blocks and cooperating members, which insure that the honingsticks make a proper abrading contact with the work and may be adjusteduniformly and to the same extent. The

preferred construction also serves to hold the honing sticks in anoperative, manually adjusted honing relation to a work surface onlyduring the honing operation, and when the hone is moved axially of thework to an inoperative position, the abrasive sticks are moved radially,so that they may be readily replaced and the work easily removed. Thisis preferably accomplished by means of a manually adjustable wedge blockor cone operatively connected to apply the required pressure on theabrasive sticks which is held in its adjusted position only while thehone reciprocates between certain limits defined by a stop whichopposes. the tendency of a spring to move the cone from its normaloperative position. The honing mechanism illustrated in the drawingscomprises the honing stick I0, and preferably a plurality of the same,which may be of standard construction and in present form are mounted asby cement in a hollow backingmember I2.

These abrading sticks may-be formed f ar Corporafrom suitable abrasivematerial, such as crystalline alumina or silicon carbide, cementedtogether by standard bonds, rsuch as rubber, synthetic resins or vitriedceramic materials, and

l the honing sticks and their mounts may be constructed in accordancewith standard procedure. Ihe backing I2 carries two spaced' pins I4projecting substantially radially therefrom in the assembled device. Thepins have wedge or cone shaped ends I6 adapted to slidably nt againstthe opposed beveled shaped surfaces I8 on two spaced wedge blocks ortapered rings 2D shaped as frustrums of a cone. The angles of thesurfaces of the tapered rings and the tapered pins are preferably about45 or as desired, and the parts are so arranged that when the upper andlower rings 20 are moved towards each other, the pins are moved radiallyinwardly and thus vcarry the abrading sticks I 0 towards the surface ofthe work 24 to be honed. The work piece may be yof any suitableconstruction and mounted as desired for the honing operation, and in thepresent case it comprises an ordinary cylindrical pin suitably mountedin a vertical position on a standard 2B.

The honing head which carries the abrasive sticks comprises a housingformed as a cylindrical body having a reduced central tubular portion 32adapted to be threaded to the supporting member thereabove. 'I'heabrasive sticks and their backing supports I2 and the pins I4 are allmounted to revolve substantially concentrically ofthe axis ofthe tube32. The pins project through holesA 34 in the cylindrical housing 30which thus form bearing supports for the radially movable abradingsticks. j

The metal container I2 is secured, as by welding, to a bent plate 36projecting above and below the container and shaped as illustrated, sothat at its upper hook shaped ends, the plate is engagedr and heldvoutwardly by a resilient spring 38 secured on the inner top wall of thehousing 30. The lower hook shaped ends of the plates are likewise heldvoutwardly by springs 40 which are hooked to a framework 42 suspendedfrom the housing 30.

The framework 42 is a hollow rectangular piece (Fig. 3) positioned belowand substantially surrounding the housing 36. It has arms 44 spacedabout apart which extend upwardly and out wardly and then turn inwardlyas shown in Fig. 1.k They terminate in lugs 46 which are attached to theupper outside portion of the cylindrical housing 30, as by means of capscrews. Vertical pins 48 are screwed into the rectangular ring 42,

and at their upper ends they pass through holes in the upper portions ofthe arms 44. Surrounding each pin 48 is a sleeve 50 on which the twoconical rings 20 are slidably mounted. Hence, the opposed conical blocks20 may move towards and from each other vertically as required foradjusting the abrasive sticks.

Attached to the upper and lower wedge blocks 20 are pairs of linksI 56and 58 connected together by pins 69. Each pin 66 extends laterallythrough an elongated guiding slot 62 in a web 63 (Fig. 2) at each sideof the hone which forms a part 'of the frame 44. The other end of thispin extends into a swinging arm 64 which is pivotally mounted at 66 onthe bracket or arm 44, as shown at the right hand portion of Fig. 1. Theupper end of this arm 64 carries a roller 68 which rides against thetapered surface of a cone or wedge block 10 which is movable up and downfor adjusting the positions of the wedge blocks. This lever 64 moves thepin 60 inwardly and outwardly, depending upon its position on the coneand thus moves the links 56 and 58 and so spreads or pulls together theconical ring 28, thus moving the abrasive sticks inwardly or outwardly.A coiled spring 12 surrounding each sleeve 5|) is arranged to hold thewedge blocks in their expanded position, as shown in Fig. 2, and thisleaves the abrasive sticks out of contact with the work except when therollers 68 are thrust outwardly by the cone 19. The cone is slidablymounted on and keyed to a hollow cylindrical tube 80 which is screwthreaded at its lower end to the upwardly projecting end of the housing38.

This cone 'l0 may be adjusted vertically on the tube 80 by means of amanually operated device comprising a nut 82 threaded onto the tube 8D.A split sleeve 84 surrounds the tube 80 and has an outwardly projectingflanged portion interlocking with an inwardly projecting flanged portionof a locking sleeve 86 which is fixed to the nut 82 by a cap screw,whereby the nut 82 may be manually revolved to raise and lower the splitsleeve 84.

A primary feature of this invention involves the provision of mechanismwhich releases the honing pressure on the abrasive sticks or causes themto move radially when the honing operation is finished. This isaccomplished in the pres'ent embodiment by means of a stop device whichholds the cone l0 in its operative position only while the honing sticksare being reciprocated norm-ally and permits the cone to move upwardlyand permit the arms 64 to move inwardly and release the abrasive stickswhen the latter are reciprocated to an. inoperative position out ofcontact with the work.

In the construction shown, each of the halves of the split sleeve 84carries two `diametrically opposed lugs 88. On these are pivotallymounted the links 90, which are in turn pivotally connected to the link92. The latter are pivotally connected to ears 94 on the cone 19. Anextension or cam 96 on the outer end of each link 92 rides against theinner cylindrical surface of a hardened sleeve 98 in a ring |90 which issuitably mounted on the framework of the machine. This sleeve 98 servesas a guide or a stop against which rides the outwardly projecting end 96of the link 92. the springs |82 connecting the links, the outer end 96of the lower link is held in position against the guiding ring or stop98, so that the latter determines the position of the cone. The stop 98is of suflicient height so that the end of each link tion of Fig. 2 wheninoperative.

Under the resilient force applied by 92 will normally ride within it asit revolves during a normal honing operation and the link end 96 willnot reciprocate far enough to run out of contact. When the honing toolis to be removed from operative contact with the work, then this linkwill be moved outwardly beyond the stop ring 98 as shown in Fig. 2, andthe springs |02 will draw the cone upwardly and so hold it out ofcontact with the rollers 68, thus permitting the abrading sticks to moveto and be held in their outward non-abrading positions. The end 96 ofthe link is so shaped as a cam that it will readily return inside of theguide ring or stop when the honing head is lowered. This constructionmakes it easy to replace the honing sticks.

The upper end of the tube 80 is connected by a double universal jointwith a reciprocating spindle ||0 which both rotates and reciprocateswithin the supporting sleeve I2 suitably mounted on the framework of themachine, these parts being made in accordance with standard constructionand forming no portion of the present invention, the lower universaljoint comprising a ball ||4 on the lower end of a tube ||6 which carriesthe socket of the upper universal joint. The socket of the lower jointis formed by suitably shaping the upper end ||8 of the tube 80 to fitagainst the lower surface of the ball. Similarly, an upper interiittingsurface |20 is formed on each of the two parts of a split sleeve |22which is held in place by a collar |24 secured by a cap screw to theupper end of the tube 80. A pin |26 passing through the ball ||4 servesto limit the swinging motion of the honing head. The construction of theupper ball and socket joint is similar and need not be furtherdescribed, these parts being substantially as shown in the prior patentto Indge No. 2,082,737 of June 1, 1937.

The operation of the construction will be apparent in View of the `abovedisclosure. Suitable honing or abrasive sticks l0 and their backingplates I2 are mounted in the machine with their cone shaped pins |4projecting into contact with the tapered rings 20. The parts are in theposi- The work is mounted axially of the honing sticks and therebetween.Then the honing head is lowered and the lugs 96 are forced inside of thering guide 98 thus driving the cone 10 downwardly and moving the rollers68 onto the tapered surface thereof and moving them outwardly. Thisforces the rings 20 towards each other and thus causes the honing sticksto engage the Work. The nut 82 may be rotated to adjust the cone to itscorrect position and thus hold the abrading sticks in predeterminedpositicns and with a required pressure against the work. As the honeswear away, this nut may be adjusted to take up for wear. The head isreciprocated and rotated until the abrasive sticks have produced adesired surface by the criss-cross break up motion of the abrasivegrains. At the end of the honing operation, the head is moved up untilthe cam ends 96 leave the stop ring 98 and the abrasive sticks youtwardly under the impulse of their springs '12.

It will now be apparent that by means of the construction abovedescribed, I have provided a simple mechanism for positively positioningabrasive honing sticks relative to a cylindrical work surface, and whichcauses them to be automatically moved out of an operative position whenthe honing head is moved axially away from the work. Variousmodifications may be made in this construction, and equivalentmechanisms substituted for those above described; hence the drawings anddescription thereof are to be considered as illustrative and not aslimiting the invention except as required by the wording of the claimsappended hereto.

I claim:

1. A device for honing a cylindrical work surface comprising a rotatableand reciprocable head, an abrasive stick mounted thereon for radialmovement relative to the work surface, a wedging device movably mountedon the head which serves to locate and hold the -abrasive stick againstradial movement, a wedge block having a tapered wedging surface which isvertically slidable on the head, adjustable means for holding the wedgeblock in a xed adjustment during a honing operation, and means includinga laterally movable member engaging and located by the tapered wedgingsurface of the wedge block which positions said Wedging device and theassociated abrasive stick and thereby holds the latter located forhoning the Work.

2. A honing device comprising a rotatable and reciprocable column,having a housing at its lower end, a wedge block having a taperedWedging surface which is vertically slidable on the column, abrasivesticks mounted within the housing for radial movement relative to a workpiece,

means including wedging devices which position the abrasive sticksrelative to a work piece, means including a laterally movable armengaging and located by the tapered wedging surface of the wedge blockwhich is positively connected to move and hold a wedging device forlocating an abrasive stick relative to the work and means for adjustingthe position of the wedge block and holding it in a xed adjustmentduring a honing operation.

3. A honing device comprising a rotary and reciprocatory head, aplurality of abrasive sticks mounted thereon for radial movementrelative to a work piece, movable Wedges which position the sticks, astationary guide having ia slide surface, a movable cam on the headwhich engages and is located by said slide surface during a normalhoning operation, a Wedge block having a tapered wedging surface whichis vertically slidable on the head and positioned by said cam, means foradjusting the position of the wedge block, a member contacting with thetapered wedging surface of the wedge block and located thereby, meansconnecting said member and the movable Wedges which locate the abrasivesticks during a honing operation and means for withdrawing the sticksfrom their honing positions when the cam is moved out of contact withthe guide surface.

HERBERT S. INDGE.

